640,753 results match your criteria: "CT; Veterans Affairs Medical Center[Affiliation]"

Ambient temperature leads to differential immune strategies in the subterranean rodent Ctenomys talarum.

J Exp Biol

January 2025

Grupo de Ecología Fisiológica y del Comportamiento. Instituto de Investigaciones Marinas y Costeras (IIMyC). CONICET - Universidad Nacional de Mar del Plata, Argentina.

Animal thermoregulation may have significant costs and compete directly or indirectly with other energetically demanding processes, such as immune function. Although the subterranean environment is characterized by thermally-stable conditions, small changes in ambient temperature could be critical in shaping immunity. However, little is known about the effects of ambient temperature, in naturally varying ranges, on immunity of wild species.

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Ultra-Early Hematoma Expansion Is Associated With Ongoing Hematoma Growth and Poor Functional Outcome.

Stroke

January 2025

Departments of Medicine and Neurology, Melbourne Brain Centre @ The Royal Melbourne Hospital, University of Melbourne, AUSTRALIA.

There is limited data on ultra-early hematoma growth dynamics and its clinical relevance in primary intracerebral hemorrhage (ICH). We aimed to estimate the incidence of hematoma expansion (HE) within the hyperacute period of ICH, describe hematoma dynamics over time, investigate the associations between ultra-early HE and clinical outcomes after ICH, and assess the effect of tranexamic acid on ultra-early HE. We performed a planned secondary analysis of the STOP-MSU international multicenter randomized controlled trial.

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Introduction: Distal arterial occlusions can cause measurable changes in the flow wave profile in proximal segments of the feeding artery. Our objective was to study the diagnostic accuracy of point-of-care ultrasound (POCUS) of the common carotid arteries (CCA) for detection of anterior circulation large vessel occlusion (ac-LVO) in patients with suspected stroke.

Patients And Methods: We conducted a prospective, single-center, observational study of adult patients with suspected stroke admitted in the emergency department.

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Purpose: We aimed to verify the impact of functional remediation (FR) on serum brain-derived neurotrophic factor (BDNF) and tyrosine kinase receptor B (TrkB) levels, to explore the biomechanism of FR intervention in patients with euthymic bipolar disorder (BD).

Patients And Methods: This is a randomized controlled, 12-week intervention study with participants randomized into the FR group (n=39) and the treatment as usual group (TAU, n=42) at the 1∶1 ratio. 17-Hamilton Depression Rating Scale-17 (HDRS-17), Young Mania Rating Scale (YMRS), and Measurement and Treatment Research to Improve Cognition in Schizophrenia (MATRICS) Consensus Cognitive Battery (MCCB) were used to assess affective symptoms and cognitive functioning both at baseline and week 12, respectively.

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Intrahepatic cholangiocarcinoma (iCCA) is a highly malignant tumor of the liver and gallbladder, which is usually diagnosed at an advanced stage and the opportunity for surgery is lost. Therefore, conversion therapy is important to convert the iCCA into a resectable state. In recent years, the conversion protocol of immuno-chemotherapy has been applied for advanced liver cancer.

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Objective: To develop and validate an explainable machine learning (ML) model predicting the risk of hemorrhagic transformation (HT) after intravenous thrombolysis.

Methods: We retrospectively enrolled patients who received intravenous tissue plasminogen activator (IV-tPA) thrombolysis within 4.5 h after symptom onset to form the original modeling cohort.

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Radiomics-based Machine Learning Approach to Predict Chemotherapy Responses in Colorectal Liver Metastases.

J Anus Rectum Colon

January 2025

Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.

Objectives: This study explored the clinical utility of CT radiomics-driven machine learning as a predictive marker for chemotherapy response in colorectal liver metastasis (CRLM) patients.

Methods: We included 150 CRLM patients who underwent first-line doublet chemotherapy, dividing them into a training cohort (n=112) and a test cohort (n=38). We manually delineated three-dimensional tumor volumes, selecting the largest liver metastasis for measurement, using pretreatment portal-phase CT images and extracted 107 radiomics features.

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Roux-en-Y gastric bypass (RYGB) is a bariatric surgical procedure commonly performed in adults to treat severe obesity. While RYGB is generally safe, it occasionally leads to rare but significant complications, including intussusception, a form of bowel obstruction caused by the invagination of an intestine segment from the proximal to the adjacent distal portion. We report a case of intussusception in a 74-year-old female patient who underwent RYGB 12 years prior.

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The morbidity of oral disorders, including gingivitis, caries, endodontic-periodontal diseases, and oral cancer, is relatively high globally. Pathogenic cells are the root cause of many oral disorders, and oral therapies depend on eradicating them. Photodynamic therapy (PDT) has been established as a potential and non-invasive local adjuvant treatment for oral disorders.

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Background: We previously reported that machine learning could be used to predict conversion to psychosis in individuals at clinical high risk (CHR) for psychosis with up to 90% accuracy using the North American Prodrome Longitudinal Study-3 (NAPLS-3) dataset. A definitive test of our predictive model that was trained on the NAPLS-3 data, however, requires further support through implementation in an independent dataset. In this report we tested for model generalization using the previous iteration of NAPLS-3, the NAPLS-2, using the identical machine learning algorithms employed in our previous study.

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Purpose: The thyroid gland is an organ at risk in breast cancer survivors who receive radiation therapy to the supraclavicular lymph nodes. We investigated the effect of radiation dose to the thyroid gland on the incidence of hypothyroidism in early-stage breast cancer patients treated with CT-guided radiation therapy.

Patients And Methods: We recruited women aged ≤75 years diagnosed with breast cancer from March 2016 through August 2017 at Odense University Hospital, Denmark.

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Purpose: Primary anterior cruciate ligament (ACL) reconstruction graft failure remains a significant health concern in young patients. Despite the high incidence of poor graft integration in these patients and the resulting high failure rate, little consideration has been given to the quality of the bone into which the graft is anchored at reconstruction. Therefore, we investigated post ACL injury mineralized tissue changes in the ACL femoral entheses of young males and compared them to changes previously reported for young females.

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Objective: This study aimed to evaluate the efficacy and safety of bisphenol A-glycidyl methacrylate (bis-GMA) without UV light polymerization for the repair of refractory iatrogenic cerebrospinal fluid (CSF) leaks with large skull base defects.

Background: CSF leakage remains a common complication after neurosurgical interventions with a substantial resultant impact on morbidity and increased healthcare costs. The management of refractory CSF leaks with large skull base defects remains challenging.

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Background: Texture analysis has the potential to deliver quantitative imaging markers. Patients receiving computed tomography (CT)-guided percutaneous bone biopsies could be characterized using texture analysis derived from CT. Especially for breast cancer (BC) patients, it could be crucial to better predict the outcome of the biopsy to better reflect the immunohistochemistry status of the tumor.

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Correction to: Recent Update on PET/CT Radiotracers for Imaging Cerebral Glioma.

Nucl Med Mol Imaging

February 2025

Department of Nuclear Medicine, Severance Hospital, Yonsei University College of Medicine, 50‑1 Yonsei‑Ro, Seodaemun‑Gu, Seoul, 03722 Republic of Korea.

[This corrects the article DOI: 10.1007/s13139-024-00847-4.].

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Thyroid cancer, one of the most common endocrine tumors, generally has a favorable prognosis but remains a significant medical and societal concern due to its high incidence. Early diagnosis and treatment of differentiated thyroid cancer (DTC) significantly affect long-term outcomes, requiring the selection and application of appropriate initial treatments to improve prognosis and quality of life. Recent advances in technology and health information systems have enhanced our understanding of the molecular genetics of thyroid cancer, facilitating the identification of aggressive subgroups and enabling the accumulation of research on risk factors through big data.

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Purpose: C-Methionine PET/CT is a promising method for detecting parathyroid lesions in patients with primary hyperparathyroidism (PHPT). We aimed to determine the diagnostic ability and correlation of digital C-Methionine PET/CT for parathyroid lesions in patients with PHPT, particularly in cases where standard imaging methods yielded inconclusive results.

Methods: This retrospective analysis was conducted on patients diagnosed with PHPT who underwent digital C-Methionine PET/CT imaging because of ambiguous results on standard imaging work-up (Tc-MIBI parathyroid scan and/or neck ultrasonography).

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F-FDG PET/CT in Inflammation and Infection: Procedural Guideline by the Korean Society of Nuclear Medicine.

Nucl Med Mol Imaging

February 2025

Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351 Republic of Korea.

Abstract: This guideline outlines the use of F-fluoro-2-deoxyglucose positron emission tomography / computed tomography for the diagnosis and management of infectious and inflammatory diseases. It provides detailed recommendations for healthcare providers on patient preparation, imaging procedures, and the interpretation of results. Adapted from international standards and tailored to local clinical practices, the guideline emphasizes safety, quality control, and effective use of the technology in various conditions, including spinal infections, diabetic foot, osteomyelitis, vasculitis, and cardiac inflammation.

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F-FDOPA PET/CT in Oncology: Procedural Guideline by the Korean Society of Nuclear Medicine.

Nucl Med Mol Imaging

February 2025

Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351 Republic of Korea.

This guideline outlines the use of 3,4-dihydroxy-6-F-fluoro-L-phenylalanine positron emission tomography / computed tomography for the diagnosis and management of neuroendocrine tumors, brain tumors, and other tumorous conditions. It provides detailed recommendations on patient preparation, imaging procedures, and result interpretation. Based on international standards and adapted to local clinical practices, the guideline emphasizes safety, quality control, and the effective application of 3,4-dihydroxy-6-F-fluoro-L-phenylalanine positron emission tomography / computed tomography for various tumors such as insulinomas, pheochromocytomas, and medullary thyroid carcinoma.

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Background: Bronchiectasis, a respiratory ailment, significantly impacts the life expectancy of individuals. This study aimed to explore the prevalence of multidrug-resistant organisms (MDROs) among bronchiectasis patients, the resistance patterns within various antibiotic classes, and the associated factors with these organisms.

Methods: A retrospective observational analysis was conducted on adult bronchiectasis patients attending clinics at Jordan University Hospital.

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Phytobezoars are indigestible organic matter that forms organized masses in the gastrointestinal tract. Seeds reported causing bezoars include sunflower seeds, watermelon seeds, and wild banana seeds. Cocoa seeds causing bezoar have not been reported.

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Introduction Colorectal cancer (CRC) is among the most frequent cancers in the United States. There are recognized guidelines for monitoring after curative CRC excision. This study looks into the rate of compliance with surveillance guidelines following CRC resection, as well as the impact of demographic characteristics.

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